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Basic Designer and Virtual Verifier (Mechanical) Practice Test: Basics of Modal Analysis
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Basic Designer and Virtual Verifier (Mechanical) Practice Test: Basics of Modal Analysis
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25 Questions

1. In steady state forced vibrations, the amplitude of vibrations at resonance is.......damping coefficient.
2. Low frequency vibration is          .
3. What is the normal stiffness factor in Ansys?
4. A deflection-pattern associated with a particular modal frequency........
5. In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be.......  .
6. The resistance of a material to elastic deformation is called........
7. Why do we need a model analysis?
8. In a spring mass system, which of the following force is not considered?
9. When a body is subjected to transverse vibrations, the stress induced in a body will be?
10. Does higher stiffness mean higher frequency?
11. A mass of 5 kg is suspended from a spring of stiffness 46 kN/m. A dashpot is fitted between the mass and the support with a damping ratio of 0.3.
Calculate the frequency.""
12. What is the formula for natural frequency for spring mass system?
13. What is the unit of resonance frequency?
14. What are mode shapes used for?
15. What is natural frequency analysis?
16. RFA full form........
17. How is frequency measured units Hertz (Hz)?
18. Which of the following methods will give an incorrect relation of the frequency for free vibration?
19. Identify the which type mode of symbol from the following.
20. The mechanical structures. It can be described as a sensitivity to a certain vibration         frequency?.
21. What are the two types of resonance?
22. The natural frequency of a system is the          .
23. Identify the which type mode of symbol from the following.
24. How many equations of equilibrium for a rigid body are there in three dimensions?
25. The resonant frequency of a structure is the frequency at which the structure will vibrate with the.......amplitude.

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